Seiko Cal. 6640 - 103

This Automatic model from 1998 features a 41mm Stainless Steel case. Powered by the 6640 caliber with 28j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-10234d6bd7f7]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1998

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